Apparatus for analyzing gas mixtures



May s, 1924. 1,493,388

vo. RQDHE AfPARATUs Fon ANALYZING GAS MIxTUREs Filed May 2. 1921 Il Il'Il Il Patented May 6, 1924.

OLOF RODHE, OF STOCKHOLM, SWEDEN,

ASSIGNOB. T0 SVENSKA; AKTIEBOLAG-ET MONO, OF STOCKHOLM, SWEDEN, ACORPORATION. i

ArPARATUs non. ANALYZING Gas MrX'rUiaEs',

Application filed May 2,

To all whom t may concefm Be it known that I, OLor` RoDHE, subject ofthe King of Sweden, residing at Odengata-n 54 A, Stockholm, Sweden, haveinvented certain new and useful Improvements in Apparatus for AnalyzingGas Mixtures, of which the following is a specification.

In analyzing gas-mixtures, particularly in gas-analyzing apparatus, thedrawback is met with that the metal-conduits leading to the apparatusmay be clogged by dirt caused by the metal being chemically acted on bythe condensable constituents.

To prevent this, a material, such as concentrated sulphuric acid is usedwhich absorbs the condensable constituents.

Then, however, another diiticulty arises, viz. that there will be anincrease in volume of this sulphur-ic acid according as the condensablevconstituents are' being absorbed. l'

Such an increase in volume must be avoided, since the same clearancespace has to be pres- `ent in the piping system in al1 analyses, asotherwise the time passing between the taking ot the test-gas from thegas-source and the introduction thereof into the gas-analyzing apparatusvaries, which in turn has a detrimental effect on the result of theanalysis.

According to the present invention-such an increase in the volume isavoided by providing an overflow pipe through which the absorbingmaterial for example concentrated sulphuric acid, automatically escapes,the said overflow pipe having one end in open communication with theinterior of the receptacle containing the absorbing material and thelower end dipping into a liquid-seal which is provided with an outlet.

A constructional form of an apparatus for carrying out the presentinvention is shown by way of example in the accompanying drawing whichrepresents a front elevation and partial section of such apparatus.

Primarily, this apparatus is distinguished in that the receptacleholding the materia-l for the absorption of the condensable constituentsis provided, in addition to inlet and outlet-pipings for thegas-mixture, with an outlet for automatically leading oliA that quantityof the liquid which corresponds to the increase in volume. The outlet isprovided wit-h a liquid seal. e

In the drawing, ct denotes the casing of the apparatus, the same beingprovided with a door a', b designates the receptacle for the for i921."semi No. 466,123;

material which absorbs the condensable constituents, c is a gas-supplypipe and d an outlet-pipe for the gas flowing Jfrom the receptacle.

e designates a cover in which is arranged a socket f for a supply-pipeand a socket g an outlet-pipe. h denotes 'a vfilter through which thegas passes between f and c.

z' is an overflow pipe leading from the receptacle ZJ, the upper mouthof this pipe being located at the level of the liquid. ,This pipe z'enters the liquid-seal Z which contains' a sealing liquid having aspecific gravity higher than that of the absorbing liquid and which isprovided with an outlet m through which the liquid is allowed to flowinto the lower receptacle' n, this receptacle being emptied whenrequired.

The mode of operation will be evident from the above description. As thecondensable constituents come into the receptaole b, they are absorbedby the sulphuric acid and as the latter increases in volume, because ofsuch absorption, it overflows into the pipe i and accumulates thereinuntil its hydrostatic head is sufficient to force the surplusage thruthe liquid in the seal Z, and escape by the outlet m. into thereceptacle n. Changes in the pressurev of the gas being analyzed willnot alect the level of the absorbent in the receptacle 5,'it only beingnecessary to meet any such change by a proper depth of liquid in theliquid seal whereby a suitable hydraulic column will be established inpipe z'. In the receptacle b there can obviously be only one constantclearance-space and a constant pressure, since on an increase in volumeof the liquid in the receptacle the excess quantity of the liquid willflow out through pipe z'.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is 1. A gas-analyzing apparatus in ywhich the gas is freed fromcondensable constituents by means of a suitable absorbing material, areceptacle for containing the absorbv ent material, a liquid sealprovidedwith an outlet, and an overflow pipe, one end of which is inopen communication with the interior of said receptacle and the otherend of which. dips into the said liquid seal.

2. A gas-analyzing apparatus in which the gas is freed from condensableconstituents by means of a suitable absorbent material, a receptacle forcontaining the absorbent material, a liquid seal provided with an outletlocated below the Said receptacle, and an overflow pipe, one end ofwhich is in open communication with the interior of said receptacle and'the other end of which dips into the said liquid seal.

3.7A gasp-analyzing apparatus in which the gas is freed fromeoudensableY constitu- 10 ents by means of a suitable absorbingmaterial, a receptacle for containing the absorbent material, a liquidSeal for the gas provided With an outlet and containing aliquid heavierthan the absorbing material, and an overflow pipe, one end of which isin open communication with the interior of said reoeptaele and the;other end of which dips into the said liquid seal.

OLOF RODI-IE.

